Color transparency



E July-{10, 1923. met-35a- F I W. V. D. KELLEY I COLOR TRANSPARENCYFiled Au 2 1920 UUUE] UUUE] UUU U\ 1- VI/IIIII/IIII.

' coating on the other side,

Patented July 10, 1923..

EJNHT i WILLIAM v. D. KELLEY, or NEWARK, 1v

PORATED, or JERSEY CITY, NEW

* httifish aw JERSEY, ASSIGNOR 'ro PRIZMA, INCOR- JERSEY, A CORPORATIONor MAINE.

COLOR TRANSPARENCY.

Application filed August 25, 1920. Serial No. 405,787.

T 0 all whom it may concern:

Be it known that IVILLIAM V. D. KELLEY, a citizen of the United States.and a resident of Newark, in the county of-Essex and State of NewJersey, has invented certain new and useful Improvement in ColorTransparencies, of which the following is a specifi cation.

This invention relates to motion pictures in color and has for itsobject to provide a simplified process whereby colored pictures may-beproduced from ordinary black and white value negatives as well as fromcolor value negatives. i

It is found that very pleasing color effects can be produced by printingfrom a single negative at a single'operation .in both coatings of amultiple coating positive and then after development and fixing in theordinary -manner applying one color to one coating and another color tothe other coating. The resulting pictures do not substantially reproducenatural color, but do produce very pleasing effects, and are foundespecially useful for titles in natural color motion picture films aswell as for toned effects in black and white films wherein theresultant'color subtractively producedby the different colors on therespective images. If the tone colors used are, for example, red andgreen, predominant red effects are producedby over-balancing either theprinting of the image to be colored red, or the tone coloring bath, andlikewise with green or Whatever colors'are used. It is found thatordinary double coated positive or transparent stock is admirably suitedfor this process because in a single printing operation from one side arelatively strong positive image will be produced in the coatingadjacent-the negative, and a relatively weaker image in the givingsuihcient opacity to produce approximations to black and sutiicientwhite to produce approximations to white with variations of intermediatecolors, depending upon the amount of color fixed in the positive images.pleasing effects can also be obtained by leaving one image in black andcoloring the other image with red, since in projection it is found thatthe'eve will supply partial sensations of green. resulting in a pictureresembling a natural color picture in whites and blacks and intermediatecolors, but not a true natural color picture because not made Very fromcolor value images and not colored making color value negatives, andwithout employing the separate printing and complementary toning stepsordinarily required in producing natural color pictures.

The invention is shown diagrammatically in the accompanying drawing,wherein Figure l is a View of a negative. Figure 2 a single printingoperation, Figure 3 a view of one side of the positive with the imagecolored red,

F i ure 4 the other side of the with the image colored green.

Figure 5 a section of the finished positive. Fig. 6 shows the printingmethod for an image containing an intermediateor gray portion, and

. Fig. 7 shows the print.

1 represents a tive having the image 2. 3 represents a secpositive tionof transparent stock having an emul-- sion 4 on one side and 5 on theother, to be printed'at a single operation, as shown in Figure 2, toproduce the positive image 6 on one side, to be colored red, as shown inFigure 3, and the second positive image 7 on the other side, to becolored green, as shown in Figure In 6, 8 is an intermediate or grayportion of the negative. and in Fig. 7. 9 is .the positive of thisportion colored red and lighter than the red section 6, while 10 is theprint on the other side colored green, and lighter than the portion 7.

The effects to be produced vary according to the exposure and color,both of which can of course be regulated in manufacture. If overexposedand then over-colored. heavy black, or almost black, images result. butif properly exposed. the whites in the object come out white in thepositive and the blacks come out substantially black. while intermediatecolors vary between red and green, according to the intensity ofcoloring.

For coloring. the ordinary metallic toning baths can be used wherein thecolor is formed by a metallic precipitate. or the posiportion of anordinary negative images can be bleached and dyed by acid or basic dyesin a known manner, or one image can be left in black and the other dyedor toned as with red, which in projection will appear to contain green,or colors containing green, although not in fact having any greentherein.

By this invention a color transparency suitable for titles, backgrounds,scenery, portraits, etc., can be cheaply made from ordinary black andwhite or color value negatives and giving a much wider range of color,owing to the possibilit of using two colors than is possible with singlecolor toned positives commonly used.

What I claim is 1. Process of making a color transparency consisting inprinting from a single negative in one operation images in difi'erentlayers images in different layers of multiple layer I positive,developing both images, and coloring said images in contrasting colors.

3. A double coated positive transparency having on each side a black andwhite value image, one of said images being colored in one color and theother in a contrasting color to produce a double toned black and whitevalue color transparency.

Signed at Atlantic City in the county of Atlantic and State of NewJersey this 20th day of August A. D. 1920.

WILLIAM V. D. KELLEY.

